JPH04337510A - System for cleaning magnetic disk system - Google Patents

Abstract

PURPOSE:To perform cleaning of an unstoppable system in a short time by controlling the magnetic disk system and restarting the rotation of the disk in the lapse of constant time after shifting the magnetic head to a cleaning area on a disk. CONSTITUTION:A central processing unit 1 gives a magnetic disk control device 4 which connects a magnetic disk 5 not being used by the command in a main memory 2 a cleaning command. By the command from the device 4, the device 5 shifts the magnetic head to the cleaning area on the magnetic disk and then gradually stops the rotation of the disk. Next, the disk 4 waits for constant time and commands the start of disk rotation for the device 5. The disk 5 increases the rate of disk rotation up to the prescribed number of rotations.

Description

[Detailed description of the invention]

0001

TECHNICAL FIELD The present invention relates to a cleaning method for a magnetic disk device for removing dust accumulated on the magnetic head of a magnetic disk device, and in particular, when the magnetic disk rotates, the magnetic head is removed from the surface of the magnetic disk. The present invention relates to a cleaning method for a magnetic disk device of a so-called contact start-stop type in which a magnetic head floats to a predetermined height from a magnetic disk and stops rotating when the magnetic head comes into contact with the surface of the magnetic disk and stops.

0002

[Background Art] When a magnetic disk rotates, a magnetic head floats to a predetermined height above the surface of the magnetic disk, and when the magnetic disk stops rotating, the magnetic head comes into contact with the surface of the magnetic disk and stops, a so-called contact start stop. In this type of magnetic disk drive, if dust is deposited on the magnetic head, it may get between the magnetic head and the magnetic disk and cause damage to the magnetic head or the magnetic disk. In order to prevent such so-called head crashes, conventional magnetic disk drives are cleaned by manually turning on and off the power at appropriate times.

0003

[Problems to be Solved by the Invention] The conventional cleaning method for magnetic disk drives as described above is useful for information processing systems in which a large number of magnetic disk drives are connected, or for information processing systems in which the entire system cannot be stopped at the same time. The system has a drawback in that it requires a large amount of time to clean the magnetic disk drive. Another problem is that the power to the magnetic disk device in use may be turned on or off by mistake.

0004

[Means for Solving the Problems] A cleaning method for a magnetic disk device of the present invention provides a cleaning area in an area different from a normal data recording area on a magnetic disk, and when the system is not in use, a cleaning area is provided from a central processing unit. Upon receiving a cleaning instruction, the magnetic head is moved to the cleaning area, the rotation of the magnetic disk is gradually slowed down and stopped, and after a certain period of time, the magnetic disk starts rotating again and the magnetic head is rotated until the specified number of rotations is reached. This includes increasing the rotational speed of the disc.

[0005]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a flowchart showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of an information processing apparatus to which the embodiment of FIG. 1 is applied.

In FIG. 2, a central processing unit 1 operates according to a program stored in a main memory 2 in response to instructions from a system console 3 that controls the interface between the operator and the program.
The magnetic disk device 5 is operated via the.

[0008] In the information processing apparatus configured in this way, when cleaning of the magnetic disk device 5 becomes necessary,
According to the procedure shown in the flowchart of FIG. 1, cleaning is performed on the magnetic disk device 5 that is not in use.

That is, in step 10, the central processing unit 1 issues a cleaning instruction to the magnetic disk controller 4 connected to the magnetic disk device 5 that is not in use, using the cleaning instruction program stored in the main memory 2. conduct. Upon receiving this cleaning instruction, the magnetic disk control device 4 in step 11 instructs the magnetic disk device 5 to stop rotating the magnetic disk. Upon receiving the instruction to stop the rotation of the magnetic disk, the magnetic disk drive 5 moves the magnetic head to the cleaning area on the magnetic disk in step 12, and then gradually slows down and stops the rotation of the magnetic disk. As a result, the magnetic head comes into contact with the cleaning area of the magnetic disk and stops. Next, in step 13, the magnetic disk control device 4 waits for a certain period of time to elapse, and when the certain period of time has elapsed, instructs the magnetic disk device 5 to start rotating the magnetic disk. In step 14, the disk device 5 receives the instruction to start rotating.
The magnetic disk starts rotating again and gradually increases its rotational speed until it reaches the specified rotational speed. At the beginning of rotation, the magnetic head rotates while contacting the magnetic disk, so dust deposited on the magnetic head is removed.

0010

As explained above, the magnetic disk drive cleaning method of the present invention provides cleaning instructions from the central processing unit to magnetic disk control units that are not in use in the system, and The disk control device controls the magnetic disk device connected to itself, moves the magnetic head to the cleaning area on the magnetic disk, stops the rotation of the magnetic disk, and after a certain period of time has passed, moves the magnetic head to the cleaning area on the magnetic disk. By starting the rotation of the magnetic disk drive, the magnetic disk drive can be cleaned in a short time even in an information processing system that connects a large number of magnetic disk drives or in an information processing system where the entire system cannot be stopped at the same time. This has the advantage that it is possible to avoid turning on and off the power of the magnetic disk device in use.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing one embodiment of the present invention.

FIG. 2 is a block diagram showing an example of an information processing device to which the embodiment of FIG. 1 is applied.

[Explanation of symbols]

1 Central processing unit 2 Main memory 3. System console 4 Magnetic disk control device 5 Magnetic disk device 10-14 steps

Claims (2)

[Claims] 1. A cleaning area is provided in an area different from a normal data recording area on a magnetic disk, and when a cleaning instruction is received from a central processing unit, a magnetic head is moved to the cleaning area to gradually stop the rotation of the magnetic disk. A cleaning method for a magnetic disk device characterized by comprising: stopping the magnetic disk while dropping the magnetic disk, and restarting the rotation of the magnetic disk after a certain period of time has elapsed, and increasing the rotational speed of the magnetic disk to a specified rotational speed. . 2. A cleaning area is provided in an area different from a normal data recording area on the magnetic disk, and when the system is not in use, the magnetic head is moved to the cleaning area upon receiving a cleaning instruction from a central processing unit. The method is characterized in that the rotation of the magnetic disk is gradually decreased and then stopped, and after a certain period of time has elapsed, the rotation of the magnetic disk is started again, and the rotation speed of the magnetic disk is increased to a specified rotation speed. A cleaning method for magnetic disk devices.